Site Name: DENVER RADIUM SITE
EPA ID: COD980716955 EPA Region: 08 Metro Statistical Area: 2080
VARIOUS PLACES IN DENVER, DENVER, CO 80204
Site Description: PROCESSING OF RADIUM IN DENVER FROM 1914 TO 1920 GENERATED LARGE QUANTITIES OF RADIOACTIVE RESIDUE. 31 SITES IDENTIFIED IN HEAVILY POPULATED AREA.
Operable Unit: 08
ROD ID: EPA/ROD/R08-92/063 ROD Date: 01/28/92
Contaminant: Metals, Inorganics, Radioactive Materials Keys: Air Monitoring; Arsenic; Asbestos; Capping; Carcinogenic Compounds; Debris; Decontamination; Direct Contact; Excavation; Filling; Ground Water; Ground Water Monitoring; Inorganics; Institutional Controls; Leachability Tests; Lead; MCLs; Metals; Mining Wastes; O&M; Offsite Disposal; Onsite Disposal; Onsite Treatment; Public Exposure; Radioactive Materials; Safe Drinking Water Act; Soil; Solidification/Stabilization; State Standards/Regulations; Temporary Storage; Treatability Studies; Treatment Technology.
Remedy:
SELECTED REMEDIAL ACTION: The selected remedial action for this site includes demolishing and decontaminating buildings, tanks, and equipment onsite; temporarily storing debris from vicinity properties onsite at the Shattuck area, pending either offsite disposal and/or scrap recycling, or salvaging of debris; disposing of asbestos-containing material from buildings offsite; conducting pilot scale treatability studies during remedial design to optimize stabilization design; excavating and transporting 5,000 cubic yards of radium-contaminated soil from the railroad rights-of-way and 6,000 cubic yards from the vicinity properties; consolidating these with 38,500 cubic yards of soil from the Shattuck property, and treating the soil onsite using cement-based stabilization; placing a cap over the stabilized material, and revegetating the area; filling previously excavated areas with clean fill; testing for, remediating and disposing of any RCRA hazardous waste offsite; allowing the ground water to naturally attenuate; monitoring ground water and air; and implementing institutional controls, including deed, land, and ground water use restrictions. The estimated present worth cost for this remedial action is $26,600,000, which includes an annual O&M cost of $120,000 for 200 years.